Depends what style really..Harmonious/drunken get Great avoidance skills and can go more dps over solid hp i think while dragon im not so sure as i have not been that style and im sure others will chime in on their thoughts.
I would say if ya plan to do any serious pulling /holding stuff 6500-7kunbuffed hp is what i would aim for on raids..rest dps based(we are a dps class after all).Flawless pariah's is a good solid raid set imo.Also you could prolly solo in this format pretty well.
Just my 2 cents

Khana, do you think "plain" pariah is better than pariah of health ?
And if not, what continental effect would be the best ?
How much unbuffed HP should i aim for APW ?
What jewelry ? Cloak ? Weapons ?
All these questions are in regards to pulling in APW

Unbuffed hp should be about 6k, this puts you at about 10-11k raid buffed.

I personally use plain armor with no boon of health because i like the continental effects ( i use qalian i think for the heal proc, which ever it is,its the one with the heal proc)

Jewlery/cloaks ---> TOT
Weapons --> Martial staff of corruption, powered blade staff of devastation, fist wraps of striking....and parrying martial sword... (Use the martial sword for pulls, the martial staff of corruptions for 90% of fights for the debuff, and the blade staff/wraps for mobs you need high dps on)

+parry adds to avoidance for sure.,  3 identical swords other then one has +0 parry, +100 parry, +200 parry and each time i do gain a few % of avoidance when i mouse over defense

1) If you  have to pick between 100 hp and 1% avoidance, id go for the 100 hp.  Simply because1% avoidance is based on even con 3 dot mobs.  Most apw mobs are 6 dots 3 levels higher with raid flags so that 1% isnt quite as noticable.

2)+mitigation is great but i wouldnt focus on it.  I prefer to just have 6k unbuffed hp, and that seems to be mroe then enough for any fight in game.  Ive killed kotasoth 4 times now and i dont have avoidance or mitigation gear, just regular hp and dps gear.  In short youd have to have a full suit of +3-4% mitigation a piece to be worth anything. 

3) theres not 1 hp/mitigation piece for monks in apw.

4) Resists are worthless for gear.  Raid buffs will be more then enough for any fight, just make sure who ever casts them gets them on you each time. Or that you have a class that can buff them....ie bird shaman add 10% fire mitigation and 200 fire resist i beleive

5) What i did was get a full suit of qalian armor with Dex>con>str ...puts me at about 500 str/dex/con and since i have nothing else on it i get about 100 hp a piece and sit at 6k unbuffed. 

Also....start using iron skin, it costs nothing and adds 75% mitigation, stacks with reed in the wind and find the center/magnificent drunken swagger.  If your not a drunken or harmonious, pulling apw is hard. 

Its 75% and a god send when pulling Sky Pirates..merc slash eww

With Psi buff giving +10% accuracy and ranger giving +5%, thestran armor is completely useless in Apw. Unless your guild  doesnt have these classes at least. Regardless get a cleric in your group and have them keep "Gift of Ardor" up (20%accuracy/dmg)
With max weapon skill you have 95% hit chance vs lvl 50, and i believe you need ~7% accuracy to max out vs lvl 53.

The few pieces of crafted i used to use were: kojan for dps set (+3 to base dmg)
                                                                           qalian/boon of health for solo/tanking/pulling (heal on every hit for 50, and +8hp per piece)

In parses my guild has done, everyone is 0.95-0.98 accuracy, and i certainly don't have any thestran armor.
On my pally and cleric i got mostly thestran armor and there is no decision i regret more